New UI : Add buffered rendering(2x)

This is same as ant-aliasing option enabled , just bind it to buffered rendering option . Original buffered rendering will be renamed to buffered rendering(native)

I'm not going to do it for old UI , only for new one

![screen00033](https://f.cloud.github.com/assets/3000282/894902/49ac1bb2-fac1-11e2-9131-530217445b4b.jpg)